SQL Server Plan Cache 計數器描述 Cache Hit Ratio快取叫用數和查閱數之間的比率 Cache Hit Ratio Base僅供內部使用。 Cache Object Counts快取中的快取物件數。 Cache Objects in use使用中的快取物件數目。 快取頁面快取物件所用的 8 KB 分頁數。
Plan cache is searched for possible plan reuse opportunities. If a plan reuse for a batch happens, its compilation costs are avoided. Note that in the SQL Server literature, the word "procedure cache" has been used to describe what is called "plan cache" in this paper. "Plan cache" is ...
了解Plan Cache 对象,该对象提供用于监视 SQL Server 如何使用内存来存储对象(例如存储过程和触发器)的计数器。
SQL Server Plan Cache 对象 Plan Cache 对象提供用于监视SQL Server 如何使用内存来存储对象(例如存储过程、即席和准备的Transact-SQL语句以及触发器)的计数器。可同时监视 Plan Cache 对象的多个实例,每个实例代表一个要监视的不同类型的计划。 下表介绍了 SQLServer:Plan Cache计数器。 对象中的每个计数器均包含以...
FROMsys.dm_os_memory_cache_entries WHEREtypeIN('CACHESTORE_SQLCP','CACHESTORE_OBJCP') GROUPBYtype; GO 在SQL Server 2008之前的版本,内部内存压力上限很少触发。因为在哈希表中的项数量总是被缓存存储中的计划的大小初始化。然而,在SQL Server 2008中,如果你启用Ad Hoc workloads优化,SQL Server 缓存存储中...
Compiled plans are stored into a part of SQL Server's memory calledplan cache. Plan cache is searched for possible plan reuse opportunities. If a plan reuse for a batch happens, its compilation costs are avoided. Note that in the SQL Server literature, the word "procedure cache" has been ...
WHERE cacheobjtype = 'Compiled Plan' ) AS ecpa PIVOT (MAX(ecpa.value) FOR ecpa.attribute IN ("set_options", "object_id", "sql_handle")) AS pvt; sys.dm_exec_query_stats视图包含plan_Handle和sql_Handle,由于sql_Handle的值是隐含的,有时,难以决定我们的查询计划究竟跟哪个sql_Handle相关。此时...
10.0 Plan Cache FlushArticle 01/17/2007 In SQL Server 2005, certain database maintenance operations or certain dbcc commands such as “dbcc freeproccache” or “dbcc freesystemcache” will clear the plan cache for the instance of SQL Server. Clearing the plan cache causes a recompilation of ...
WHERE cacheobjtype = 'Compiled Plan' ) AS ecpa PIVOT (MAX(ecpa.value) FOR ecpa.attribute IN ("set_options", "object_id", "sql_handle")) AS pvt; 不是所有的Set选项都引起重编译,下列Set选项改变时会引起重编译: 1、ANSI_NULL_DFLT_OFF ...
where name IN ( 'SQL Plans' , 'Object Plans' , 'Bound Trees' ) Auf 64-Bit-Systemen beträgt die Anzahl der Buckets für den SQL Server Plancache beispielsweise 40.009. Daher ist die maximale Anzahl vo...